JP7210617B2 - Induction heating system and method for silicon steel cores with self-adhesive coatings - Google Patents

Description

The present invention relates to systems and methods, and more particularly to heating systems and methods.

BACKGROUND Lamination methods for modern mass-produced motor cores primarily include bolting, welding, riveting and gluing. In the adhesive method, silicon steel sheets covered with self-adhesive coatings are assembled by surface fixation to each other, which means no pollution, high core fixation strength, low magnetic vibration noise, and core efficiency. To provide a laminate molding process that has the advantage of being expensive. It is particularly suitable for situations where other fixing methods would cause distortion or insufficient stiffness and where riveting or welding is inconvenient.

Current conventional application guidance for silicon steel sheets with self-adhesive coatings is to take the core (then actually separate plates) drilled by a punch as a whole, 6-30. placing the core on the clamp under the pressure of the bar, conveying the core to a heating furnace and heating at 150-220° C. for 1-4 hours, removing the core after cooling and extruding removing the rough edges, which results in a finished core product. Such process steps result in relatively low production efficiency, require frequent human intervention, and cannot achieve rapid continuous automatic operation, thereby resulting in high energy consumption and production operation costs. . Not only that, the silicon steel cores solidified in different batches differ in bond strength, core thickness differences and extruded protruding edges, and the production stability is not good. Accordingly, in the prior art, several researchers have made related improvements to lamination tools to increase production efficiency and improve the solidification quality and stability of cores with self-adhesive coatings. I've been However, the solidification and heat retention time of the core with the coating does not change, the whole process of core solidification from heating, heat retention in the furnace to cooling and exiting the furnace generally takes about 10 hours, and the efficiency is Still low compared to other silicon steel products.

In the prior art, some researchers have found that if a silicon steel sheet core with a self-adhesive coating is quickly heated to a target temperature in a short time and thereby satisfies the corresponding temperature distribution requirements, good We have found that an adhesive hardening effect can also be achieved. JP 11-187626 proposes rapid heating of a self-adhesive core via a high-frequency electromagnetic field generated by high-frequency microwaves and proposes the structure of a high-frequency microwave emitting source and associated heating equipment. do.

However, the inventors of the present application have found that the high frequency induction heating method can only be used to heat a stack of small size silicon steel sheets. As the size of the silicon steel sheet increases, due to the skin concentration effect of induction heating, the heating area is mainly concentrated in a very narrow area of the surface layer of the silicon steel sheet, and in the diameter direction of the silicon steel sheet, The surface can reach a high temperature quickly, while the interior is heated mainly by heat transfer from the surface to the inside, and the interior temperature is relatively low compared to the temperature of the surface, the surface and core of the silicon steel sheet laminate. are designed to provide large differences in adhesion performance between regions. Therefore, high-frequency induction heating cannot achieve effective heating of large silicon steel sheets and cannot cover a wide range of silicon steel sheet specifications.

Induction heating is a method that can achieve efficient and rapid heating. However, frequency selection has a significant impact on the heating effect. If a lower frequency is chosen, the depth of the skin concentration layer of induction heating eddy currents can be increased, but the heating efficiency is lower. If a higher frequency is selected, the depth of the skin concentrating layer is reduced and the heating efficiency is higher, but the temperature difference between the surface and the interior of the heated workpiece during heating is greater.

In view of this, a silicon steel core with a self-adhesive coating can be rapidly solidified and the quality of solidification of the core product can be guaranteed, thereby manufacturing a silicon steel core with a self-adhesive coating. It would be desirable to have an induction heating system that is widely applicable in the field of

SUMMARY One object of the present invention is to provide an induction heating system for the rapid solidification of silicon steel cores with self-adhesive coatings, the system comprising: and can ensure the solidification quality of core products and increase production efficiency, thereby being widely applicable in the field of manufacturing silicon steel cores with self-adhesive coatings. be.

SUMMARY OF THE INVENTION To achieve the above objectives, the present invention provides an induction heating system for silicon steel cores having self-adhesive coatings. The system includes an induction heating device including a cylindrical induction heating coil with a hollow cavity, the induction heating coil heating a silicon steel plate at a frequency of between 6 and 20 KHz. Induction heating is performed in the waveband.

In the technical solution of the present invention, the use of an induction heating coil with a medium wave band of 6-20 KHz for induction heating of silicon steel sheets is applicable to a wide range of silicon steel sheet specifications. Considering both rapid solidification of the core product and assurance of solidification quality, the outer diameter of the silicon steel sheet is preferably φ50-400 mm, more preferably φ50-300 mm.

Furthermore, the induction heating system of the present invention greatly shortens the setting time of silicon steel sheets and offers the possibility of automatic production of silicon steel cores with self-adhesive coatings. Accordingly, the present invention further provides an induction heating system capable of achieving automated processing, the system further comprising a transport roller table, the transport roller table having a plurality of stacked molds being transported thereon. and the lamination mold is used to place a laminated silicon steel sheet therein;
an induction heating device, the induction heating device further comprising a temperature measuring element for measuring the temperature of the silicon steel sheet;
a feed and discharge device for horizontally conveying the stack;
a loading/unloading device for horizontally transporting the laminate mold to a position beneath the induction heating coil and stacking it into the hollow cavity of the induction heating device; configured to transport the mold vertically or move the laminate mold out of the hollow cavity after induction heating is complete; and
a control device connected with the conveying roller table, the feeding/unloading device and the loading/unloading device respectively to control their respective operations; and the induction heating coil and the temperature measurement. elements are also connected to control the induction heating process. In the technical solution of the present invention, the temperature measuring element is used to measure the temperature of the silicon steel sheet. In some embodiments, the induction heating device may further include an induction heating device support such that the induction heating coil and the temperature measuring element may be positioned on the induction heating device support. Further, the loading/unloading device horizontally conveys the laminate mold to a position directly below the induction heating coil and vertically conveys the laminate mold into the hollow cavity of the induction heating device. As configured, accurate positioning of the laminate mould is achieved such that the induction heating coil can accurately heat the silicon steel plates placed inside the laminate mould. Furthermore, a control device is respectively connected with the conveying roller table, the feeding and discharging device and the loading and unloading device to control their respective operations, and is also connected with the induction heating coil and the temperature measuring element, Because the induction heating process is controlled, rapid solidification and efficient automated production of silicon steel cores with self-adhesive coatings are achieved and production efficiency is improved. It should be noted that in some embodiments the laminate mold may be made of non-metallic materials.

Further, in the induction heating system of the present invention, the feed and discharge device includes a horizontally extending cantilever and a manipulator capable of running along the cantilever.

In the technical solution of the present invention, in some embodiments, the manipulator's walking and clamping operations may be controlled by servo motors. Additionally, the cantilever may be attached to a support for positioning the transport roller table.

Still further, in the induction heating system of the present invention, the conveying direction of the conveying roller table and the conveying direction of the feed and discharge device are perpendicular to each other.

Furthermore, in the induction heating system of the present invention, the temperature measuring element is an infrared temperature measuring element.

Furthermore, in the induction heating system of the present invention, the temperature measuring element is arranged in the middle of the induction heating coil.

Furthermore, in the induction heating system of the present invention, the loading/unloading device is
comprising a support;
a vertical displacement adjustment element, the vertical displacement adjustment element being arranged on the support and connected with the control device;
a substrate connected to the vertical displacement adjustment element and driven by the vertical displacement adjustment element to move vertically;
a horizontally movable plate disposed above the substrate and connected to the control device, the horizontally movable plate being horizontally slidable relative to the substrate; is composed of;
A stacking mold seat for placing the stacking mold is included, the stacking mold seat being disposed on the horizontally movable plate.

In the technical solution of the present invention, the horizontal movable plate is disposed on the substrate and connected with the control device, and the horizontal movable plate is configured such that the loading and unloading device is the induction heating coil. It is configured to be horizontally slidable with respect to the substrate so that the stacked mold can be horizontally transported to a position directly below. The vertical displacement adjustment element is arranged on the support and the loading/unloading device vertically conveys the stack mold into the hollow cavity of the induction heating device or the induction heating device. It is connected with a control device so as to move the laminate mold out of the hollow cavity after completion. In some embodiments, the laminated seat may be made of a non-metallic material.

Furthermore, in the induction heating system of the present invention, the laminated seat is provided with a pressure sensor, and the pressure sensor is connected with the control device.

In the technical solution of the present invention, the laminated seat is equipped with a pressure sensor to detect the pressure on the laminated seat in real time, and the pressure sensor is controlled by a control device transmitted by the pressure sensor. It is connected with a control device to control the degree of compression of the silicon steel plate based on the pressure value.

Further, in the induction heating system of the present invention, the induction heating system further comprises:
a distance measuring element disposed above the induction heating coil and connected to the control device; detecting the distance between the steel plate and transmitting the distance to the control device; controlling the distance conveyed and the control device controlling the distance the compression disc moves vertically;
a compression force adjustment element, the compression force adjustment element positioned above the induction heating coil and connected to the control device;
The compression disc is connected to the compression force adjusting element, and under the control of the control device and under the adjustment of the compression force adjusting element, the compression disc moves vertically downward. and presses the silicon steel plates inside the laminate, or moves vertically upward to release the silicon steel plates.

In the technical solution of the present invention, in some embodiments, the induction heating device may further include a fixed rod connected with the induction heating device support, and the compressive force adjusting element is a compressive force It may be connected to the fixed rod such that the adjustment element is attached to the induction heating device support through the fixed rod. A distance measuring element is connected to the compression force adjustment element for attachment to the induction heating device support through the compression force adjustment element. Additionally, in some embodiments, the compression disc may be made of a non-metallic material.

Similarly, another object of the present invention is to provide an induction heating method for the rapid solidification of silicon steel cores with self-adhesive coatings, which method comprises silicon steel with self-adhesive coatings. It can rapidly solidify the steel core and ensure the solidification quality of the core product and increase the production efficiency, so that it is widely applied in the field of manufacturing silicon steel core with self-adhesive coating. It is possible.

In order to achieve the above objectives, the present invention provides an induction heating method for rapid solidification of silicon steel cores with self-adhesive coatings, wherein the laminated silicon steel sheets are heated at between 6 and 20 KHz. Induction heating coils are used to perform induction heating in the waveband.

Further, the induction solidification method for rapid solidification of silicon steel cores with self-adhesive coatings provided by the present invention includes the following steps, which comprise compressing the laminated silicon steel sheets: Then, the laminated silicon steel plate is subjected to induction heating by an induction coil in a medium wave band of 6 to 20 KHz, and the temperature of the silicon steel plate is measured in real time, and the silicon steel plate reaches a target heating temperature. is the step of stopping the heating by the induction heating coil when .

In the present invention, the heating can be stopped whenever the silicon steel sheet reaches the target heating temperature, thereby greatly shortening the heating time of the silicon steel core with self-adhesive coating.

Similarly, still another object of the present invention is a method for heating a silicon steel sheet by using the induction heating system described above, the method rapidly forming a silicon steel core having a self-adhesive coating. It can solidify and ensure the solidification quality of the core product and increase the production efficiency, so that it is widely applicable in the field of manufacturing silicon steel core with self-adhesive coating.

To achieve the above objectives, the present invention provides an induction heating method for rapid solidification of a silicon steel core with a self-adhesive coating, which induces heat into the silicon steel sheets laminated inside the laminate mold. The induction heating system of the present invention is used to carry out the heating.

In the technical solution of the present invention, in some embodiments, the process of induction heating to the silicon steel sheet laminated inside the lamination mold by using the induction heating system of the present invention is as follows: There may be:

(1) Before induction heating of the silicon steel plate, the target heating temperature of the silicon steel plate, the target compressive stress value applied to the silicon steel plate, the initial position of the horizontal movable plate, the initial position and compression of the vertical displacement adjustment element Relevant parameters and initial values are first set, including the initial position of the disc.

(2) After the silicon steel plate is laminated inside the lamination mold, the lamination mold and the silicon steel plate are placed together on the conveying roller table and conveyed through the conveying roller table to the induction heating operation area. be. The transport roller table may adopt step-by-step transmission. When the lamination mold and the silicon steel sheet reach the induction heating operation area, the conveying roller table stops the operation, and the manipulator of the feeding and discharging device clamps the lamination mold and removes the lamination mold and the silicon steel plate. The steel plates are carried together by the cantilever into the stacked seat of the loading and unloading device. The feed/eject device then completes the feed operation. A pressure sensor on the laminated seat sends real-time compressive stress values to the control device, and the control device obtains an initial compressive stress value.

(3) A horizontally movable plate transports the laminate and silicon steel plates to a position directly below the induction heating station to achieve accurate and concentric positioning. Then the distance measuring element detects the distance from the silicon steel plate and sends data to the control device, and the control device detects the thickness of the laminated silicon steel plate, the vertical displacement adjustment element needs to rise. calculates the amount of displacement and the height the compression force adjustment element needs to descend, and sends them to the vertical displacement adjustment element and the compression force adjustment element respectively. The vertical displacement adjustment element performs the loading operation according to the command from the control device and raises the laminate and silicon steel plate to the middle part of the induction heating coil. The compression force adjustment element then executes the command of the control device and lowers the compression disc to the specified position. The control device then calculates in real time the difference between the compressive stress value measured by the pressure sensor and the initial compressive stress value, and sends a lowering command to the compressive force adjusting element to adjust the lowering height of the compression disc. Adjust and compress the laminated silicon steel plates until the compressive stress value reaches the set target compressive stress value, and the position of the compression disc is locked. At that time, the loading and compression operations are completed.

(4) The induction heating coil performs induction heating on the silicon steel plate in the medium wave band of 6-20 KHz, and the temperature measuring element measures the temperature of the silicon steel plate in real time. When the silicon steel plate reaches the target heating temperature, the induction heating coil stops heating. The compression force adjusting element raises the compression disc to its initial position and the vertical displacement adjusting element lowers to its initial position. At that time, the unloading operation is complete.

(5) The horizontally movable plate moves from the position directly below the induction heating station to the initial position of the horizontally movable plate, and the manipulator removes the laminated mold and silicon steel plate from the laminated mold seat, and A beam carries them to a transport roller table. At that time, the ejection operation is complete.

The rapid induction heating and self-adhesive solidification of the silicon steel plate is achieved by the above steps, and the conveying roller table continues to operate, and the next treatment for the silicon steel plate is to repeat the above steps. may be performed by

Compared with the prior art, the induction heating system and method for rapid solidification of silicon steel cores with self-adhesive coatings has the following beneficial effects:

With rapid induction heating in the medium wave band, the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention rapidly solidifies silicon steel cores with self-adhesive coatings. and ensure the solidification quality of core products and increase production efficiency, thereby being widely applicable in the field of manufacturing silicon steel cores with self-adhesive coatings.

FIG. 1 is a structural diagram of an induction heating system for rapid solidification of a silicon steel core with a self-adhesive coating of the present invention in a feeding state in some embodiments. FIG. 2 is a structural diagram of the feed and discharge device in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention. FIG. 3 is a structural diagram of an induction heating device in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention. FIG. 4 is a structural diagram of loading and unloading devices in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention. FIG. 5 is a structural diagram of the loading and unloading device at the initial state of loading in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention. . FIG. 6 is a structural diagram of the loading and unloading device in the state of loading completion in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention. . FIG. 7 is a structural diagram of an induction heating system for rapid solidification of a silicon steel core with a self-adhesive coating of the present invention in an initial loading state in some embodiments.

DETAILED DESCRIPTION OF EMBODIMENTS Induction heating systems and methods for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention are further described below in conjunction with the drawings and specific embodiments, and ,be written. However, the explanations and descriptions do not unduly limit the technical solutions of the present invention.

FIG. 1 is a structural diagram of an induction heating system for rapid solidification of a silicon steel core with a self-adhesive coating of the present invention in a feeding state in some embodiments. FIG. 2 is a structural diagram of the feed and discharge device in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention. FIG. 3 is a structural diagram of an induction heating device in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention. FIG. 4 is a structural diagram of loading and unloading devices in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention.

As shown in FIG. 1, in some embodiments, an induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings in the present invention comprises a carrier roller table 3, a carrier roller table It may include a support 4, an induction heating device 7, a feeding and discharging device 5, a loading and unloading device 6 and a control device (not shown). A plurality of lamination molds 2 (made of non-metallic material) are conveyed on a conveying roller table 3, and the lamination molds 2 are used for placing the laminated silicon steel sheets 1 therein, and the conveying rollers The transport direction of the table 3 and the transport direction of the feed/eject device 5 are perpendicular to each other. Control devices are respectively connected with the transport roller table 3, the feeding/unloading device 5 and the loading/unloading device 6 to control their respective operations.

With further reference to FIGS. 2, 3 and 4, in some embodiments the feed and discharge device 5 transports the stack 2 along the horizontal direction and is mounted on the transport roller table support 4. and includes a cantilever beam 51 extending horizontally and a manipulator 52 capable of moving along the cantilever beam 51 . In some embodiments, the walking and clamping operations of manipulator 52 may be controlled by servo motors.

Furthermore, the induction heating device 7 comprises an induction heating device support 71, a cylindrical induction heating coil 72 with a hollow cavity, a temperature measuring element 73, a compression disc 74, a distance measuring element 75, a compression force adjusting element 76 and a fixed rod. 77 can be seen. An induction heating coil 72 and a temperature measuring element 73 are arranged on the induction heating device support 71, and the induction heating coil 72 inductively heats the silicon steel plate 1 in the medium wave band between 6 and 20 KHz. to run. A temperature measuring element 73 is used to measure the temperature of the silicon steel plate 1 and is arranged in the middle of the induction heating coil 72 . In some embodiments, temperature measuring element 73 may be an infrared temperature measuring element. The induction heating coil 72 and the temperature measuring element 73 are connected with a control device to control the induction heating process through the control device. A distance measuring element 75 is positioned above the induction heating coil 72 and is connected to the compression force adjustment element 76 so as to be attached to the induction heating device support 71 through the compression force adjustment element 76 . Furthermore, the distance measuring element 75 is connected with the control device, and the distance measuring element 75 detects the distance between the distance measuring element and the silicon steel sheet 1 inside the laminate mold 2 and controls it. device; and based on the signal transmitted by the distance measuring element 75, the control device controls the distance that the loading/unloading device 6 conveys the stack 2 vertically, and the control device: Controls the distance that compression disk 74 moves vertically. The compression force adjustment element 76 is positioned above the induction heating coil 72 and is connected to the fixed rod 77 such that the compression force adjustment element 76 is attached to the induction heating device 71 through the fixed rod 77, and , the compression force adjusting element 76 is connected with the control device. The compression disk 74 is connected with the compression force adjusting element 76, and under the control of the control device, under the adjustment of the compression force adjusting element 76, the compression disk 74 moves vertically downward, and Pressure is applied to the silicon steel plate 1 inside the lamination mold 2, or the silicon steel plate 1 is released by moving vertically upward. In some embodiments, compression disc 74 may be made of a non-metallic material.

Furthermore, the loading/unloading device 6 includes a support 61 , a vertical displacement adjusting element 62 , a substrate 63 , a horizontally movable plate 64 and a laminated seat 65 . The vertical displacement adjustment element 62 is arranged on the support 61 and allows the loading and unloading device 6 to transport the laminate mold 2 vertically into the hollow cavity of the induction heating device 7. or connected with a control device so as to move the laminate mold out of the hollow cavity after the induction heating is completed. The substrate 63 is connected to the vertical displacement adjustment element 62 and driven by the vertical displacement adjustment element 62 to move vertically. A horizontally movable plate 64 is arranged on the substrate 63 and connected with the control device. The horizontally movable plate 64 is horizontally slidable with respect to the substrate 63 so that the loading/unloading device 6 can horizontally transport the laminate mold 2 to a position directly below the induction heating coil 72 . It is configured. A laminate mold seat 65 is positioned on the horizontally movable plate 64 for positioning the laminate mold 2 and is made of non-metallic material in some embodiments. The laminated seat 65 is equipped with a pressure sensor (not shown) to detect the pressure against the laminated seat 65 in real time, and the pressure sensor detects the pressure value transmitted by the pressure sensor by a control device. is connected with a control device so as to control the degree of compression of the silicon steel 1 based on.

FIG. 5 is a structural diagram of the loading and unloading device at the initial state of loading in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention. . FIG. 6 is a structural diagram of the loading and unloading device in the state of loading completion in some embodiments of the induction heating system for rapid solidification of silicon steel cores with self-adhesive coatings of the present invention. . FIG. 7 is a structural diagram of an induction heating system for rapid solidification of a silicon steel core with a self-adhesive coating of the present invention in an initial loading state in some embodiments.

Referring to Figures 1, 2, 5, 6 and 7, in some embodiments, the process of inductively heating a silicon steel sheet laminated inside a laminate mold by using the induction heating system of the present invention comprises: It may be as follows.

(1) Before the induction heating of the silicon steel plate 1, the target heating temperature of the silicon steel plate 1, the target compressive stress value applied to the silicon steel plate 1, the initial position of the horizontally movable plate 64, and the vertical displacement adjustment element 62 Relevant parameters and initial values are first set, including the initial position of the and the initial position of the compression disk 74 .

(2) After the silicon steel plate 1 is stacked inside the lamination mold 2, the lamination mold 2 and the silicon steel plate 1 are placed together on the conveying roller table 3 and induction heated through the conveying roller table 3. transported to the operating area. The transport roller table 3 may adopt step-by-step transmission. When the stack mold 2 and the silicon steel sheet 1 reach the induction heating operation area, the transport roller table 3 ceases operation, and the manipulator 52 of the feeding and ejection device 5 clamps the stack mold 2, and , the laminate 2 and the silicon steel sheet 1 are brought together by the cantilever 51 to the laminate seat 65 of the loading and unloading device 6 . The feed/eject device 5 then completes the feed operation. A pressure sensor on the laminated seat 65 sends real-time compressive stress values to the control device, and the control device obtains the initial compressive stress values.

(3) Horizontal movable plate 64 transports laminate mold 2 and silicon steel plate 1 to a position directly below the induction heating station to achieve accurate and concentric positioning. Then the distance measuring element 75 detects the distance from the silicon steel plate 1 and sends data to the control device, and the control device detects the thickness of the laminated silicon steel plate 1, the vertical displacement adjusting element 62 calculates the amount of displacement that needs to be raised and the height that compression force adjustment element 76 needs to be lowered, and sends them to vertical displacement adjustment element 62 and compression force adjustment element 76 respectively. The vertical displacement adjustment element 62 performs the loading operation according to the command from the control device and raises the laminate mold 2 and the silicon steel plate 1 to the intermediate part of the induction heating coil 72 . The compression force adjustment element 76 then executes the command of the control device and lowers the compression disc 74 to the specified position. The control device then calculates in real time the difference between the compressive stress value measured by the pressure sensor and the initial compressive stress value, and sends a lowering command to the compressive force adjustment element 76 to determine the lowering height of the compression disc 74. and compress the laminated silicon steel plates 1 until the compressive stress value reaches the set target compressive stress value, and the position of the compression disc 74 is locked. At that time, the loading and compression operations are completed.

(4) The induction heating coil 72 performs induction heating on the silicon steel in the medium wave band of 6-20 KHz, and the temperature measuring element 73 measures the temperature of the silicon steel plate 1 in real time. When the silicon steel plate 1 reaches the target heating temperature, the induction heating coil 72 stops heating. Compression force adjustment element 76 raises compression disk 74 to its initial position, and vertical displacement adjustment element 62 lowers to its initial position. At that time, the unloading operation is complete.

(5) The horizontally movable plate 64 moves from the position directly below the induction heating station to the initial position of the horizontally movable plate 64, and the manipulator 52 moves from the seat 65 of the laminated mold to the laminated mold 2 and the silicon steel plate 1. , and the cantilever beam 51 transports them to the transport roller table 3 . At that time, the ejection operation is complete.

The rapid induction heating and self-adhesive solidification of the silicon steel sheet 1 is achieved by the above steps, and the conveying roller table 3 continues to operate, and the next treatment for the silicon steel sheet is to perform the above steps. It may be performed by iteration.

Specific Embodiments Embodiment 1
The stack of silicon steel sheets 1 used in this embodiment has an outer diameter of φ120 mm, an inner diameter of φ40 mm and a stack height of 130 mm. The compressive force in the direction of stack height is set at 2-3 KN. The stack of silicon steel sheets 1 enters an induction heating coil 72 and is heated at a frequency of 10 KHz to reach 300 degrees for 5 minutes and then cooled to room temperature.

Performance Test Adhesive strength tests are performed on laminates of silicon steel sheets by using a tension gauge. During the test, the stack of silicon steel sheets was glued to one end face fixed to the test platform by double-sided strong adhesive tape and to the outwardly extending tensile test end by a mechanical structure connected with a tension gauge. It has the other end face. During the test of the solidified silicon steel sheet core prepared by the technical solution of Embodiment 1, the tension gauge exceeded its range, showing a maximum of 115 kgf, but the silicon steel sheet laminate still It is not pulled apart, which proves that the core prepared by the technical solution of the present invention has good adhesion effect.

By using the same method, the adhesion of riveted laminates and welded laminates were tested for comparison. The riveted cores are evenly distributed with 12 riveting points, and the laminated cores of silicon steel sheets are pulled apart under a pulling force of 23 kgf. The welded cores are evenly distributed in the circumferential direction with six weld seams, and the laminated cores are pulled apart under the action of 25.5 kgf.

Briefly, in the induction heating system for rapid solidification of a silicon steel core with a self-adhesive coating of the present invention, a silicon steel core with a self-adhesive coating is formed by rapid induction heating in the medium wave band. can be rapidly solidified; for silicon steel sheets with an outer diameter of less than φ100 mm, the heating time can be as short as 1-5 minutes; for silicon steel sheets with an outer diameter of φ100-300 mm, the heating time is 2 can be as short as ~10 minutes; compared to cores punched by punches in the prior art, which typically need to be heated for 1-4 hours to achieve solidification, the system is self-adhesive. It greatly shortens the processing time, improves the production efficiency and facilitates the automation operation in the manufacturing process of the silicon steel core with the coating. Furthermore, the system can guarantee the quality of consolidation of core products with adhesive strengths reaching 115 kfg or more, and can be widely applied in the field of manufacturing silicon steel cores with self-adhesive coatings.

The prior art part of the protection scope of the present invention is not limited to the embodiments provided in the application documents, and the solutions and solutions of the present invention including, but not limited to, prior patent documents, prior publications and prior publications. It should be noted that all non-contradictory prior art may be included within the protection scope of the present invention.

Furthermore, the combinations of various technical features in this application are not limited to the combinations described in the claims in this application or the combinations described in specific embodiments. All the technical features described in this application can be freely combined or incorporated in any manner as long as there is no contradiction between them.

It should also be noted that the above-listed embodiments are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above-described embodiments and similar changes or modifications thereto can be obtained by those skilled in the art directly from the disclosure of the present invention or from the disclosure of the present invention. It can be easily conceived and should belong to the protection scope of the present invention.

Claims (10)

An induction heating system for a silicon steel core having a self-adhesive coating, the induction heating system for a silicon steel core having a self-adhesive coating comprising:
characterized by having a conveying roller table, the conveying roller table being configured to convey thereon a plurality of laminate molds, the laminate molds having silicon steel sheets laminated therein. used to
characterized by having a feeding and discharging device, said feeding and discharging device being arranged to convey said stack horizontally from said conveying roller table to a loading and unloading device,
characterized by comprising said loading/unloading device, said loading/unloading device conveying said stack mold in said horizontal direction from said feeding/unloading device to a position beneath a cylindrical induction heating coil. and conveying the laminate vertically into the hollow cavity of the cylindrical induction heating coil; or configured to move the laminate mold out of the hollow cavity after completing induction heating in the waveband;
characterized by comprising an induction heating device, said induction heating device comprising said cylindrical induction heating coil with said hollow cavity and a temperature measuring element , said temperature measuring element measuring the temperature of said silicon steel plate and used to measure
characterized by having a control device, said control device being respectively connected with said conveying roller table, said feeding and discharging device and said loading and unloading device to control their respective operations; a device is also connected with the induction heating coil and the temperature measuring element to control the induction heating process ;
An induction heating system for a silicon steel core having a self-adhesive coating as described above. 2. Induction heating system according to claim 1 , characterized in that the feeding and ejecting device comprises a horizontally extending cantilever and a manipulator traversable on the cantilever. 2. Induction heating system according to claim 1 , characterized in that the conveying direction of the conveying roller table and the conveying direction of the feeding and discharging device are perpendicular to each other. 2. The induction heating system of claim 1 , wherein said temperature measuring element is an infrared temperature measuring element. 2. Induction heating system according to claim 1 , characterized in that the temperature measuring element is arranged in the middle of the induction heating coil. The loading/unloading device is
having a support;
a vertical displacement adjustment element arranged on the support and connected with the control device;
a substrate connected to the vertical displacement adjustment element and driven by the vertical displacement element to move in the vertical direction;
a horizontally movable plate disposed above the substrate and connected to the control device, the horizontally movable plate sliding relative to the substrate in the horizontal direction; configured to be able to;
A lamination type seat for placing the lamination type is provided, and the lamination type seat is arranged on the horizontally movable plate,
The induction heating system of claim 1 . 7. Induction heating system according to claim 6 , characterized in that said laminated seat is provided with a pressure sensor, said pressure sensor being connected with said control device. The induction heating device further
a distance measuring element disposed above the induction heating coil and connected to the control device, the distance measuring element being laminated with the distance measuring element and conveying said distance to said control device; and based on the signal conveyed by said distance measuring element, said control device detects said an unloading device controls the distance that the stack mold is conveyed in the vertical direction, and the control device controls the distance that the compression disc moves in the vertical direction;
a compression force adjustment element, the compression force adjustment element positioned above the induction heating coil and connected to the control device; and
The compression disc is connected to the compression force adjusting element, and under the control of the control device, under the adjustment of the compression force adjusting element, the compression disc moves vertically downwards. and apply pressure to the silicon steel plate inside the lamination mold, or move vertically upward to release the silicon steel plate,
Induction heating system according to any one of claims 1-7 . characterized by comprising the steps of: compressing a laminated silicon steel plate ; performing induction heating with said induction heating coil in an induction heating system for a silicon steel core with a self-adhesive coating according to claim 1 and measuring the temperature of said silicon steel sheet in real time; and A method of induction heating for a silicon steel core with a self-adhesive coating, comprising the step of stopping heating by the induction heating coil when the silicon steel sheet reaches a target heating temperature.
A self-adhesive coating , characterized in that induction heating is carried out on a silicon steel sheet laminated inside a laminate mold by using an induction heating system according to any one of claims 1 to 8 . induction heating method for silicon steel cores with

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